The dot plots represent test scores for two different exams. Which of the statements are true?
I. Exam 1 has a greater standard deviation than exam 2.
II. Exam 1 has a greater median than exam 2.
III. Exam 1 has a greater interquartile range than exam 2.
IV. The means of the exams differ by less than one percentage point.
A.
I and III
B.
II and III
C.
II and IV
D.
I and IV
D. I and IV
From the dot plots, we can see that Exam 1 has a wider distribution of scores, indicating a greater standard deviation. Additionally, the means of the exams are very close to each other, differing by less than one percentage point.